Registration Dossier
Registration Dossier
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EC number: 271-591-2 | CAS number: 68585-82-0
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation is not relevant for this substance because yttrium oxide, europium doped is inorganic.
Hydrolysis is also not relevant because the substance is insoluble in water and also because analytical tools to support the hydrolysis test are not available, i.e. techniques to differentiate between the substance and potential hydrolysis products at very low concentration levels.
The substance will have a low bioaccumulation potential mainly due to its insolubility in water: the substance has a low potential to cross biological membranes and exposure to the aquatic compartment is unlikely.
Adsorption of yttrium oxide, europium doped was not measured since not only the water solubility is low, but also the solubility in aquatic buffers, organic solvents etc. and thus chromatography is not possible. Although yttrium salts, such as carbonate and chloride, did show moderate to high potential to adsorb to soils/sediments, thus confirming the preferred environmental compartment of these salts, yttrium oxide, europium doped is not expected to behave in a similar way due to its insolubility in water in combination with the unlikeliness of exposure to the aquatic compartment.
Yttrium and Europium are both rare earth metals, belong to the lanthanides and they do not occur in nature as free element. Yttrium's estimated abundance in the earth's crust is 28 -31 ppm (0.0028 -0.0031%). Both elements readily oxidize in water and/or air.
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